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A 2 Sheets-Sheet 1f J. R. BURDICK 80W. H. DAVIS.

Y SEWER PIPE MACHINE. No. 292,535.

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' UNITED 'STLES PATENT' ola-1ct.

JOHl\T ROLAND BURDICICAND VILLIAM H. DAVIS, OF .MINNEAPOLIS MINN.

SEWER-PIP; lvl/ICH'INE.`

srrcrricnrron vform-alg para or- Lettersvratent No. 292,535, dated January 29,1854. I Application filed February 2l, 1893. (No model.) i

Be it known that we, JOHN ROLAND BUR- DICK and WILLIAM HENRY DavIs, both citizens 'of .the United States, and both residing at Minneapolis, inthe county of Hennepin, in the State of Minnesota, have invented certain new and useful Improvements in Sewer-Pipe Machines. of which the following specification is a full, clear, and exact description, refof the latter being in section.

erence being also hadto the accompanying drawings, in which- A mechanism and three of the pipe-molds, one Fig. 2 is an end View of the tamping mechanism, and a side view of one of the molds. Fig. 3 is a plan view of the revolving Amoldfbed, anda hori- Zontal sectional view of the mold arranged thereon. Fig. et is a rear view, Fig. 5 is a cross-sectional view, and Fig. 6 is a plan view of the tampingpmechanism. Figs. 7, '8, and 9-are detached and disconnected `perspective views ofthe core-expanding mechanism. .,.Fig 10 shows det-ached and disconnected perspective views of the 'tamping-bar-operating mechanism. Fig. l1 is a plan view of the` m old-bed plate, and a horizontal sectional view of the mold varranged therein. Fig. 12 is a longitudinal sectional view on the line xix of Fig. 11. Fig. l13 is a plan view of the moldbed plate; and Fig. 14 is an inverted view of the mold, illustrating the manner of constructing and operating the mold to form egg-shaped pipe. Fig. l5 is an enlarged sectional view of ,a portion of the mold and its bed-plate, illus- A trating more full-y its construction. l A is the floor upon which the machinery is set, and Bis a cast-iron standard secured to said floor, and having an upright shaft, B2,

running through it and projecting downward through the'fi r, and adapted to be revolved by a horizontal shaft, C, and bevel-gears C2 G3,

and projecting upward through the upperen'd ofthe standard, andhaving upon said` projecting upper end a.miterpinion, OH 1 Surrounding the upper'part of the .standard B is a large .collar 1'?. .or ,...headj,V77 l.D,':sup ported by a. shoulder, a, on. the standard, and

. adaptedto turn'freely thereon. Atttached to this head D, and running off atl. right.angles thereto, is a frame, E', having an' open-slotted central part, b', and dovetail7 upper and lower edges, b2 b3. f

E2 is a dat plate, resting across the face of the frame E', and having ribs or guidespb,

Aadapted to fit4 over the dovetail edges b2 b3, so

that while said plate is free to be moved back andiforth along the frame E it cannot be removed therefrom, eXcept by drawing off from the ends of the frame. Y

y 6o Formed upon the outer face of the plate E2 is a projection, E3, having'a-n upright slot, c,`\ in which a flat upright rod orbar, F', is adapted to slide up and down freely, being held in place within the slot cgby aface-plate. 6 5.

E4, attached to the projecting part B3. The central portion of thek projecting part E3 is cnt out, as shown 'at d in Fig. 10, to permit the cams G G2 to come in contact with the sides `of the bar F, as hereinafter shown.

Upon the rear of the frameiE," near the head D, is a hanger or bracket, H', support ing one end of a horizontal shaft, H2, which runs outward parallel with the frame E and opposite the center of the slot b', and at right angles to the shaft B2 of the standardB. Upon the end of this shaft H2, between the hanger H and head D, is a miter-pinion, H3, adapted to engage with the miter-pinion C* on the shaft B2, by which the revolution of the shaft `B2 will be communicated to the shaft H2, and at the Sametime by this arrangement the Vhead `D and its attached frame E maybe revolved around the standard B without interfering with the action of the shafting.

y `H3 is another bracket or hanger, attached to the rear part of the plate E2, and adapted to support the shaft H2 atthatpoint, and mounted loosely upon this shaftH2, upon opposite" sides vof the bracket H3, are two oppositely-facing miter-gears, H4 H5. The shaft H2 has a horizontal featherjor groove, e, cut in its whole length, in iwhich keys in the interiornof the gears H* H? lit loosely, so that while-,the plate E2l and its attached parts may be move'd freely 9 5 back and forth :along the frame E and carry the ,f rears'HrH5 with it, the-.latter will be ref volved with the shaft H2 at all times independently of thelfposition of the parts upon the frame E. Iflfprcferred, theipinions'fH* 'H5' roo maybe madefast upon the shaft H2, and the latter'made to slide'through the hanger H and the pinion H, this pinion H3 having a key on the interior of its hub to fit into the feather c. The action, however, is the same in both cases. v

l I'z are two small slides, fitting loosely within the slot b', and attached by their inner ends to the rear face of the plate E, and with their outer ends adapted to carry small horizontal shafts g g2, as shown. rlhese small shafts pass through the slot b' and plates I' I", and are provided on their rear ends with niiter-gears F 1*, engaging with the gears H* H5 on the shaft HZ. By this means the shafts g' g'l are revolved in opposite directions through the mediuln of the gears and shafts, as shown. Fixed upon the outer ends of the shafts g' g2 are two segmental cams, G' G2, having faces formed of leather or similar substance, and adapted to be revolved in surface-contact with the opposite sides of the bar F', as shown in Fig. l. By this arrangement, when the cams lr' G2 are revolved toward each other, the segmental parts of the cams will catch the bar F between them and elevate it a distance equal to the length of the arc of the circle of their faces, and then leave the bar and allow it to drop of its own weight when the fiat portions of the cams are opposite the bar. By this construction of the cams the bar F' will be raised up and allowed to drop once in every revolution of the shafts g' y, to tarnp the plastic material of which the pipes are formed into the molds, as hereinafter described. The lower end of the bar F' is provided with a removable shoe or foot, F2, as shown, to increase the tamping-surface of the bar.

The slides I' l2 will be provided with small open-ended slots h, (see Fig. 10,) by which they are attached to the plate El, so that they may be adjusted to regulate the amount of the pressure of the cams G' G`z upon the bar F', or to set the cams nearer to each other when worn. The shaft g' is continued outward beyond the cam G', and provided with a miter-gear, K', engaging with another miter-gear, K', upon an upright shaft, K3, having upon its lower end a screw feeding device, K4. This shaft K3 is held by ahanger, K5, attached to any suitable part of the plate E2 or its attachments, so that they will be carried along the frame E' together, and the screw-feeder K4 is surrounded by-a conical casing, K, having a curved outlet, K7, at the bottom, and alarge supply hopper or reservoir, Ks, leading into its upper part, as shown, this conical casing K being firmly attached to the hanger K5. By this bmeans the plastic material of which the pipes are formed, being placed in the hopper K8, will be fed by the screw K4, out through the exit 6o K7 in an even regular stream ata oint in close proximity to the bar F', as shown.

t" is a rack formed upon or attached to the lower edge of the frame E', at a point so as l not to interfere with the plate E2, in which a small pinion, i2, is adapted to run. This pinion 1'? is mounted upon a small shaft, i, jours.

nalcd in an arn1,'*, upon the plate E2, (see Fig. 10,) and provided on its outer end withahandwheel, 5, so that the plate El and its attached parts may be moved back and forth along the frame E' by simply turning the shaft i by its hand-wheel if.

m' is a small lug or arm on the plate E2, in which is pivoted a lever, m2, adapted to be forced inward toward the bar F' by a small cam, G, on the shaft g2, outside the larger cam G', as shown.

m3 is a small slide,'pivoted at its outer end in the lever in", and its inner end adapted to pass through the lower part of the projection E, and be thrown in contact with the bar F' by the ealn G'i once at every revolution of the cams G' G2.I The cam G will be so placed that the inner end of the slide m3 will be thrown in contact with the bar F' at the point where the cams G' G leave it, so that a brake is formed to check the upward movement of the bar F' just when the cams cease to act, so that there will be no danger ofthe momentum of the bar causing it to run up higher than the stroke of the cams would carry it. 'hen running slowly, no danger exists of the bar being thrown upward but when running at a high rate of speed, there is danger of the bar being thrown too high; hence the object of the bra-ke mi. A rubber, leather, or other suitable cap may be used upon the inner end of the slide m, to cause it to more quickly and surely act upon the bar F.

In Fig. 1 the upper end of the projecting part E3 is shown provided with a tube, E4, of any suitable length, into which the upper end of the bar F' runs up and down. The upper end of the bar F' is provided with an extension-bar, F", upon which weights F will be placed to increase the striking power of the bar and its shoe F2 when required, the tube Ei merely serving as an additional guide, to prevent the extra weight upon the bar from bending it over sidewise.

A small hand-wheel, G*, (shown only in Fig. 6),' will be attached to the outer end of the shaft g2, by which the cams G' G`l may be, turned by hand, (the gearing connect-ing the shaft with the mechanism below the ioor A having first been disconnected to release the bar F') and enable the bar F'- to be raised up out of the mold, for changing the shoes F2 or for altering the position of the bar with relation to the mold. After the bar F' is thus elevated by hand, if the cams G' G2 be turned around vuntil their faces are again in contact with the bar, the latter will be clamped and held elevated, or iu whatever desiredpo- .sition.

Secured upon the floor A at equal distances apart, and at the same distance from the eenter of the standard B', are a number of molds,

in which the pipes are formed. By using a series of the molds after the material is tampy ed into one mold, the camping mechanism may be swung around on the head D and the IOO IIO

reservoir to lubricate the two plates.

next mold filled while the first mold is-re.-

moved, the pipevpermitted to F setand be removed from -the 'mold, `and the empty mold replaced `before the remainingvmolds in the series are filled, so that the tamping mechanism may be used uninterruptedly. Any desired number of these molds may be used, according to the length of the frame E', but ordinarily four will be sufficient to keep the tamping mechanism in constant operation. In4 Fig. l one ofthese molds is shown at the right of the standard B'. in section, and another at the left in outside elevation, while a third 'is shownin the background in the rear of the standard, also in outside elevation. These molds `consist in a circular stationary bed-plate, M, securedin a level position upon the oor A, and with-a central hollow sleeve, M2, in which a hollow hub, M, 'on another circular revolving plate, Mt, runs, a's shown. In the outer upper edge of the plate M is a channel formed by two circular ribs, n a2, on the plate M', into which chanf nel aring, as, on the upper plate, M4, is adapted to run, the channel forming an oil- 'ffriction and strain by this arrangement is removed largely from the central hub, M, and sleeve M2 and borne by the outer edges of the plates. Small grooves at a5 will be formed inl the channel next to the ribs n' a2, to form reservoirs for the'oil'and any grit or sand that may work in between the plates;

and the ring a on the plate M4 will be narqv rower than the space between the ribs n a2, so that the4 edges of the ring n4 and the ribs a n2 willtnot touch each other, but all the friction will be borne bythe central part of the channel between the ribs n' /n'i' and the lowers'urface of the ring a. i y

Secured upon the upper surface of the plate M4 is another plate, consisting of a central circular part, M5, a little larger than the outer diameter of the lower part of the mold, and

with two proj ections, M6 M7, on opposite sides, to which standards N' N2 are secured. The

plate M5 M6 MT is attached securely to the plate M* and revolves with it.

Upon the upper part of the plate N5 a ring, M8, is secured, the inner diameter of the ring being the same size as the inner diameter of the pipe to be molded, and the vouter diameter of vthe ring being the same size as the outer diameter of the pipe.

P' is a ring formed in two equal parts, hinged together at' one side at r', and coupled together by any suit-able coupling, r2, at the other side.

This divided ring is formed to :tit closely around the, solid ring MB and rest upon the upper surfaceofthe plate M5. t. A semicircular groove, r, is formed in the ring P',- at vits intersection with the ring M8, into whichpthe; plastic material'fo-rming the pipes is forced to form'the usualrib on the lower end of the sections of the pipe. f

Attached to the upper edge of the ring P TheV i is' a sheet-metal tube, P2, of the same interior diameter as the exterior diameter of the pipe to be molded, and attached at its 'upper end to a ring, P3, formed in two parts, hinged on other side at rf", in .the same manner as the ring P'. The tube P2 is also" formed in two equal parts, the joint being `in line with the joints of the rings P and P?, and is strengthened at the center bya third divided ring, P,

otherside at ri, these rings P' P3 Pt and the tube P2 forming a cylinder adapted to be opened and closed longitudinally, and with its interior conforming to the exterior of the pipe to be molded. The outward flare of the ring P3, as shown, is the same shape as the outwardly-flaring coupling end of the pipe to be molded.

P5 is a sheet-metal tube, adapted to t Asufficient length to reach from the upper surface of the plate M5 part ofthe ring P where its oiit\i'arcl.iiari1ig couplingforming partbegins, as shown in Fig. l.' l Each of the plates M* is provided with a driving-shaft, R', driven by suitable gearing, R2, and shafting R, below the iioor.

Secured in an upright position in the center of each of the plates M* and adapted to revolve with it is atube, T', having disks T2 fast thereon at suitable intervals. Three of these disks are shown in the drawings, but any desirednumber may be used. Each of the t', radiating from vvits center, asshown in Fig. 8, which represents a'perspective view of one 0f these disks reversed, and eac-h groovey is adapted to receive a small dog, t2, whose outer ends project lagainst -thc interior of the tube ward and rest in cam-slots t in disks T3. These disks T3 are loose upon the tubes T', and conform in size to the disk ll, and are held .up beneath them by collars or-othersuitable means upon the tribes T.

T* isan upright shaft, setting loosely down inside the tube T, and projecting a short dis-y tance above it, and provided with a square head yabove the tube T', by which the shaft may be turned. At points justbelow each of the disks' T3 small horizontal slots tt are cut through the tubes T', and at points opposite these'slotsholes are bored into the shaft T5. -Each of the disks T? has attached to its under surface a small spur or pin, t5, adapted to pass through the slots t* and rest in theholes opposite the slots in the shaft T5.

disks T3 as far as the length of the slotsvz will permit, and cause the cam-groovest3 to force the dogs t2 outward and inward, according to which direction the shaft T* is turned.

The tube P5 is formed with a joint through.-

outI its entire length, and with an overlapping one side atv-t, and coupled together on thel hinged at one side at r6, and coupled at the closely the interior of the ring M8, and of a.

to a point opposite that,

disks T2 is provided with a series of grooves,

P5, and whose inner ends are turned down` A By this means. the turning of the shaft T5 will revolve the .c

roo

piece, yr, attached to one part of the tube, to cover the joint and allow the two edges to be spread apart a short ,distance without forming an open joint. The tube P5 will be formed so that when the two edges of its joint are brought close together` its diameter will be less than the interior diameter of the pipe tobe molded, and will have sufficient springiness to keep the joint closed when the dogs t are turned inward by turning the shaft T". By this means the tube P5 (which acts as a core to the pipe to be formed) may be set down inside the mold and outside the series of dogs i, and then expanded to conform to the interior diameter of the pipe by simply revolving the shaft T a short distance. and then, after the pipe is completed, the core may be reduced again in size to enable it to be withdrawn by simply reversing the motion oi' the same shaft.

In the upper end of one of the standards, N', at w', aring, U, is pivoted by a projecting arm, 10"', attached to one side of the ring, while a similar projecting arm, w, on the opposite side of the ring, fits down into slots in the upper ends of the standards N2. The rings U are formed to rest upon the upper outer edges of the rings P, and with no part thereof projecting beyond the interior of the rings l. A key or other fastening, x, will be used to secure the arms rw3 in the standards Nl, if found necessary. The holes in the standards i'or the pivots of the arms 102, are slotted, as shown, so that the rings U may rise and fall slightly to enable them to adapt themselves to the, surfaces of the rings P, and then, when down in the proper position, a small wedge may be in serted in the slot in the standard above the pivot, to hold the ring U down in place upon the mold. By this means the molds are securely held in position upon the plates M.

The standards N N2 and ring lll8 may be attached directly to the plate M4 and the plate M5, and its projecting parts M6 M7 dispensed with, if desired; but by attaching the standards and mold-base all to one plate, much time may be saved in changing the molds to make di'erent-sized pipes.

The above-described form of mold will be used for circular pipes; but egg-shaped or other irregular forms will require somewhat different mechanism to operate them, as it is necessary that the molds be so revolved as to cause every part to pass the 'ramping-bar F at the same point.

The manner we have adopted for revolving the ordinary egg-shaped molds is shown in Figs. 11, 12, 13, 14, and 15. This consists in a circular or other shaped bed-plate, V, se cured to the door A, and provided with a small ovalshaped cam groove, y', and a larger heart-shaped cam-groove, y2, outside of it,'as shown in Fig. 13, which represents a plan View of the plate V detached. Lying upon top of the plate V is another plate, V, conforming to but a little larger than the egg-shaped pipe which is to be formed thereon. Upon top of this latter plate an eggshaped ring, VV, is secured, corresponding to the ring MS, and for the same purpose, and upon this plate V2 is placed the mold in which the pipe is formed, which is constructed and operated in the same manner, except that it is made egg-shaped instead of circular. Projecting down from the lower part oi the plate V2 are two pins, z z2, adapted to set down into the cam-grooves y 1/2, as shown. The center of the pin z is opposite the center of the upper or larger segmental part of the mold, and the pin z is opposite the center of the lower or smaller segmental part. Upon the lower part of the plate V2 is a curved rack, z, con' forming in shape to the egg-shaped mold, and adapted to be acted upon by a pinion, zi, pro jecting up through the plate V', as shown.

is a canrgroove parallel with the rack .2, in which a pin, s, projecting up from the plate V', fits. By this arrangement the revlution of the pinion e* will cause thc plate V2 to revolve, and by means of the cam-grooves y, y2, and the rack e3 will always be held in contact with the pinion et; hence, if the tamping-bar F be adjusted to rise and fall within the mold at a point opposite the pinion .e1-the mold will be so revolved as to retain the same relative position to the tamping-bar at all points of its revolution. By this means an oval or egg shaped pipe may be as readily tamped as a circular one. Any other form oi' pipe may also be formed by a slight variation in the form of the cam-grooves y y2, it being` onlyT necessary that all parts ot' the mold pass revolution.

This machine may be used to form pipes of any plastic material; but we intend it more particularly for the material described in the Patent No. 244,988, August 2, 1881. This material requires to be tamped into the mold a small quantity at a time and at regular intervals, and by means of the screw feeding device and the constant even tamping by the rod F the material will be of a uniform consistency throughout the pipe. One great advantage gained by this arrangement of the lifting mechanism for the rod F is that it strikes with the same degree of force at all parts of the work, as the cams G GrIZ lift it upward precisely the same distance at every stroke. Vhen the material is tamped into the molds up to a point level with the upper part of the core P5, a head, P, is set upon top of the core I, as shown in dotted lines in Fig. l, the outside of this head conforming to the inside of the coupling end of the pipe. The mechanism carrying the tamping-bar F is then run out ward upon the frame E a short distance, to cause the shoe F2 to fall upon the material within the space between the head l? and ring P3, and thereby tamp the coupling or bell end of the pipe. The shoes F2 on the bar F are made removable, as shown in Fig. 10, so that new or differentsized ones may be easily beneath the ramping-bar at one point of its IIO 4'placed thereon. Each size of 4pipe requires a material, means for. revolvingysaid molds, an

different-sized shoe, and the coupling-collar or `uprightstandard, B', equidistant from y' all of f enlargement on the pipe requires a differentshaped shoe; and by making the-shoes easilyj and quickly changeable much time is saved.

In forming the pipes of the material de-v scribed in the Patent No'. 244,988, above referred to, itis :necessary to keep ythe material, molds, shoes, shovels, and trowels with which it is handled, and alsoy the screw'feeding device, heated, and by forming the shoes F2 removable, as soon as one becomes cool ahot one may be placed on the bar F' with very little trouble.

Pipe-machines have been before constructed in which the molds are arranged concentrically around a vertical spindle or shaft around which the tamper swings or turns, and oval and irregular forms of pipes have been molded with a tamper traveling around in and adapting itself to the form of the mold. These features we do not broadly claim.

Having described our invention and set forth its merits, what we claim is l. The combination of a rotary mold adapted to receive plastic material for forming pipe,

means for rotating the mold on its axis, and a tamping-bar having a rising and falling move- Ament and radial and circular adjustments, sub- ,stantially as and for the purpose herein speciiied.

2. The combination of a rotary mold for re.- ceiving plastic pipe-forming material, means for rotating the mold on its axis, means for automatically feeding the plastic material iny to the mold, and a tamping-bar having a riscular adjustments, substantially as ing and falling movement and radial and cirand for the purpose specified.

3. The combination of a rotary mold for receiving plastic pipe-forming material, means for rotating the mold on its axis, a rising and falling camping-bar, and revolving segmental cams G' G2, adapted to alternately lift the tamp-V ing-bar and to let it drop upon the pipeform ing material in the mold, substantially as specied.

4. The combination of a rotary mold for receiving plastic pipe-forming material, means for rotating the mold on its axis, a tampingbar having a rising and falling movement, a feeding spout or case, K, adjustable in position over the mold, a screw-feeder, K4, and means for rotating the said feeder, substantially as herein specified. Y

5. The combination of two or more rotary molds adapted to receive plastic pipe-forming materia-1,. means for rotating each mold, a standard equidistant from the several molds, a frame revolving on the standard and carry- -ing the tamping-bar, andV a rising and falling tamping-bar having an adjustment upon the carrying-frame toward and from the support` ing-standard, for the purpose specified.

6. The combination, with two or more molds adapted to-receive plastic pipe-forming cams,- andfa tamping bar, F', lheld loosely yupon said plate E2, and adapted to vbe raised upward by said cams and allowed to fall of its own weight, substantially 'as described.

' 7. rlhe combination, with two or more molds adapted to receive plastic pipe-forming material, means for revolving said molds, an upright standard, B', equidistant from all of said molds, a horizontal frame, E', adapted to revolve upon said standard asacenter, aplate, E2, adapted to slide up on said horizontal frame, segmental cams G G2, means for revolving said cams, a tamping-bar, F',heldloosely upon said plate E2, and adapted to be raised upward by said cams and allowed to ,fall of its own weight, and a brake adapted to be applied to said tamping-bar at the end of its upward stroke, substantially as and for the purpose Vset forth.

v8. The combination, with two or more molds adapted to receive plastic pipe-forming material, means for revolving said molds, an upright standard, B', equidistant from all of said molds, a horizontal frame, E', adapted to revolve upon said standard as a center, a plate, E, adapted to slide upon said horizontal frame, segmental cams G G2, means for revolving said cams, and a tamping-bar, F', held loosely upon said plate E2, and adapted to be raised up ward by said cams and allowed to fall of its own weight, and a screw-feeder, Kt, substantially as and for the purpose set forth.

9. The combination, with two or more molds adapted to receive plastic pipe-forming material, means for revolving said molds, an

upright standard, B', equidistant from all of said molds, a horizontal frame, E', adapted to revolve upon said standard as a center, a plate, FF, adapted to slide upon said horizontal frame, segmental cams G' G?, means for revolving said cams, and a tamping-bar, F', held loosely upon said plate El, and adapted tobe raised upward by said cams and allowed to fall of its own weight, a guide-tube, E, and weights F4, substantially as and for the purpose specified.

10. The combination, with the mold adapted` to receive plastic pipe-forming material, of a central sheet-metal core, P5, adapted to be expanded or contracted, fixed tube T', having yslots t", stationary disks T2, provided with grooves t', and disks T3, having cam-slotsl t3 and spurs t", substantially as set forth.

l1.y The combination of the stationary baseplate M', provided with a lubricating-channel at its'outer edge and a sleeve, M2, at-its center, a revolving' plate, M, having a hub, M, fitting into said sleeve, a mold adapted to receive plastic pipe-forming material, standards N' N2, and ring U, substantially as speciiied.

IOS)

IIO

. a rising and falling tampingbar, and means,

In testimony whereof we have hereunto Set our hands in the presence of two subscribing witnesses.l

JOHN ROLAND BURDICK. ULI/IAM H. DAVIS.

"itnesses C. N. WOODWARD, LOUIS FEESER, Sr.

substantially as described7 for giving the mold a rotary movement accurately beneath the Jcamping-bar in everT part of the revolution7 for the purpose specified. 

